This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
| n | a(n) |
|---|---|
| 2 | 1 |
| 3 | 1 |
| 4 | 3 |
| 5 | 6 |
| 6 | 18 |
| 7 | 42 |
| 8 | 130 |
| 9 | 332 |
| 10 | 1048 |
| 11 | 2836 |
| 12 | 9078 |
| 13 | 25578 |
| 14 | 82730 |
| 15 | 240124 |
| 16 | 782956 |
| 17 | 2324800 |